Home / 20,807.50-28,704.32-13,634.32

Finding the Fourth Proportional to 20,807.50, 28,704.32 and 13,634.32

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Solution

The fourth proportional to 20,807.50, 28,704.32 and 13,634.32 is: 18,808.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,807.50 : 28,704.32 = 13,634.32 : x
  2. Step 2: Convert to fraction form
    20,807.50/28,704.32 = 13,634.32/x
  3. Step 3: Cross multiply
    20,807.50x = 28,704.32 × 13,634.32
  4. Step 4: Simplify right side
    20,807.50x = 391,363,884.26
  5. Step 5: Solve for x
    x = 391,363,884.26/20,807.50
  6. Step 6: Final answer
    x = 18,808.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.